Railroad control circuits



H. B. RUDD RAILROAD CONTROL CIRCUITS Sept. 23, 1930.

'iled June 2v. 192s iPattedSent. 1931.01k "1' y f j 1,776,337. ,i j

' le 3.15am;l n.lRnnng`orvnodenasmoiv,nnwionx j d* -rnsirnnoiinjcoivrrnor.k crncnrrs Application 1ed..1'une27, 1928. K4Serial No. 28,8,.584. l y Y vvgflfllhis'inventionrelates to railroad `control cated and :are bothconnected across the cir` :fr circuits,.such-for example; as may be usedl in cult of'wires 16 and 17 pair of connecconnection With afutomatietrain controlling f tion Wires 2O and 22 extend `from the rails l v devices signalingfapparatus, etc. 1, n 11 and 10 respectively at a point near the end f [The ob'ects of this kinvention include the of the block, thewire V22 if desired being conl55 provisiongof simple, dependableandrelativenected in series With an adjustable resistance ly inexpensive control Vcircuits lof `the class `as at`f21. A; pair of electromagnets 23 and i i above indicated, such .circuits runningl 24 may be positioned along the track and loi' `through the railsfof thetracl; but having a cated respectively adjacent the electromag- `Lm source lof: operating currentcarriedby' the nets-18 and `19. ,j The magnets 23 and 24 are 60 movin'gnlocomotive,car or other railroad or both connectedacrossthe circuit of connecf Y railway vehicle. j j fw vtion Wires 20.and 22. y ,Y Further andinore specific objectsyfeatures Y j Theapparatus of Fig. 2Which is located v andadvantages Will clearly appear tromthe` uponthe movingvehiclefwill now be =de 15 detailed description given below taken inconscribed. A ,c suitable source ofalternating fG5 nection withv the accompanying drawings current is indicated at 25 connectedin series Y yWhichform a part ofthis specification andil-y with an electromagnet 26, similar in con# -Y lus-trate merely by Way of example certain c struction to the electromagnets 23 and'21l,` and Vfernbodiments of the invention. J l, .V j designed uto momentarily cooperate'therewith fyi The invention consists inthe novel feaj as the vehicle moves Halong the track, Ani 1711 tures, circuit arrangements andlcoinbinations other electromagnet 27 `is mounted von the veof devices einbodiedjbywa'yotexample inthe hicle `preferablyinapproximatelythe same Y apparatus herein described as` illustrating spacedfrelationship to the electromagnet 26 as preferred` forms ofjqthefinvention, together the relationship of electromagnets 19 and 24 j ll With 'such novel control methods as are here,- and of electromagnets 18 and 23. *That is, the 15 yinafter described.,V j, .magnets 26 and 27 are preferablycarried on a In the drawings Fig. lis acircuitdiagram 4moving vehicle in a position in Aalignment j schematically illustrating ra railroad .track with thedirectionfof movementso that when n equippedwith a control circuit arrangement the vehicle arrives over the magnets adjaembodying my invention; and centthe track, the four poles of the .eleid .10 yFigs. 2liand 3 respectively schematically'v tromagnets `261and 27 Wi'llallbe uniformly VShOW WOGmbOClIIlGHS 015111@ 10011310118 Ofth@ spaced `from the correspondingfour poles of control-*circuits carried ,byy the *moving-r rail-V ith@ electromagnets 193ml, 24, 0r the-ejectrw n Way vehicle and for operatioirmconjunction ,magnets 18 andgg. j

* l1717115110171"311105 $11911 as thbsfof FFL-)111y f v, ".Theelectromag'net '27 may be connected infg5 Refelrmg t9 the drawmgzthe two @1190i vseries With the Windinff 28 of a relay, having A afi track are uidlmhecl rreSpAC-twelyiatlp and l1" yan yarinature29, softha Whenever thecoil of theraili joints at the ybeifinfning and" ending ,my Wm losea Clrul't ihr-Ough .lts Contact@ .90

of each'bloclr as indicated-alt 12 1314 and 15 anda Sultable Source-0i Current-"31 Connected l ..-..,v2'f. f The circuitarranged as indicated is designed g a Controltlldget 32' Th Con-310i magnet to Operate in conjunction*wthtmus or other j may beu lkize to operate anyA esiredwell ,vehicles moving (Neither,track4 inthe direcknqwn fgrfn'of 21111 @mm1 devlce 0.1i' 51g r ktion indicated by thelarrovv." A pair ofcon- '112111112' 11317111931 Th@ 11111111122911191113 1111017611@- ati medion ,wireslie and 17 are connected to the Sllbetl 1S 1vart111--1arly-adapte-f1 1015 Operation rails 11 and 10 respectively lat points-adjacent 111 001111111011011 Wlth 13121111 0911110111115' 119171099 v the beginnngof a, blgk; "Ata point along of, the run-down.7 type which arewell known the track near the endof the previous block, inthe art. Examples of such devices aredisj j so a pair ofelectromagnets atand lgarekloclosedin the patents to Bower, 1,261,961 of ico y apra e, 1918 and 1,399,100 of December 6,' 1921. The operation of the above described cir-AVK cuits will now be explained in further-detail.

"Asfthe electromagnet *26,* energizedbythe ysource ofcurrent 25 and carried by the mov?? lng vehicle, approaches a Ypointvvheretzits poles are oppositethe poles of the" stationary electromagnet 241, a current Will beinduced'in the Vcoil of electromagnetll.. This'currentY kWill normally flow through the circuitA of con.-k nection Wires 20, 22, resista'moeQ1,y rails 1.0y and.-vv 11, connection Wires 16 and 17 and throughv coilsof electromagnets 18V and 19; .-Hoivever,

if the rails 10 and 11 shouldbe electrically f e cionnectedaswhen a train or car islocatedin the control block of these rails, thenlthe coils or, electromagnets 18 and 19 (Will be short "and 119givill failto be energized.` However?V yWhenever 'the railsA` 1Q and 11 are in proper circuited and vvWill notbe energizediby the current established inthe coil ofmag'net 2K1.` l'tfisra'lsoj apparent that-if one orfbothfof theel4 rails 10 Va'nd11 should become broken apart at any point, the coils of electromagnets 18 "condition andreefrom carsvk and trains,k the energization of the stationary electromagnet 19 will cause ja current t'o be induced in the ooilof movingniagnet 27, at` the moment Y gizes the relay coil 28,2opera'tes the relay and e V`thus brings i about the energization of the f [35 when the, electroniagnet 26 induces` a current fin the coil of electroniagnet24;.t vThe current through electromagnetv 27 Vaccordiifigly ener- 'control magi'ietj; It kthe controlmagnet 32 is associated With a socalledrun-down type of train controldevce, the impulse asA lthus ,applied to the' control serve. toinitiatev the resetting action of the z ""runedown? device.` f Y l As themoving vehicle proceeds yfurther along the track, the'electromagnet 26 Willin- `duce the current in the coil of 'electromagnet n 23 andk inaA manner similar to that above described,l an impulse' will .be vinduced in the welectromagnet 27; if the track in the block aheadrisvifree and clear `and in good condi?- tion. Thereupon the control magnet [-32 Wil-l receive a second impulse ywhich mayV be utilized tostop the resetting operationofthe fru-nedown device and permit such device to vinitiate its lrun-down action Which Will persist. until either the -device-.frruns down and appliesthe locomotive brakes, or until the next control block in the trackisreachedI andthe device is reset in the abovedescribed l 'ynainngrf f j 'With theyabove described lapparatus the stationary electromagnets yalong A`the i track may vbe, positionedso as toiconie into suiiiciently close proximity of the moving electromagnets 26 and 2:7 to. permit inductionof cated tar enou'ghabove the track or to one side magnet 32 will of the stationary"magnets soy-that under no y normal circumstances:Wouldit bepos'sible fork the movi-ng electromagnetsfto strike' the 'sta-. tionaryelectromagnets. vlvllechanical; coaction of the stationary and moving circuit 'devicesV Visaccordingly!ivholly.,eliminatedyithus greatl `llyl reducingfthe' possibilitypffexcessive Wear)V f or breakagt-SL` Furthermoregthesourceof cur-K: 'Y Vrenti-may with thisl arrangement'be'carried. Y by the moving; trains orvehicles so that the Y "system be conveniently and `econoinically Y Y rfnaint'ainedif The use of the" alterna-ting cur i rent insures -the'induction of suflicient our? rentin the stationary part ofthe kcircuit -re-VIV gardless vofthespeed of travelo the vehicle.

Itrwillbeunderstoo'd thateach succeeding 1 q block ofthetrack mayzf-be provided with 'sta-ff,V tionary 1 magnets and' circuit' connectionsy in the form above described,the stationary elec-A tromagnets be'inghspacedv ata braking di'stance ahead of each block. f The pairo'f elecdown device usedL I In lori-del" t0. insure?. uniorintyV of' the loperation-of the :relay with allof'lthe `control blocks, the resistance `of, the variouscontrol lblocks circuits: may be'v adjusted to uriiiorm Y y values by tlieuse ofthe adjustableresistance 21ifd'esir`ed.V n. i Y Unlersome conditionsit isfeasible toop; er'atethe, control magnet" or magnets directlyv fromthe'circuitof electromagnet'27,in which Vcases, itis unnecessary to interpose the yrelay'.

The' embodiment of? the Vinvention f illusi tratedf in Fig'. '3 isL similar to that otfFig.A 2, r like parts beingreferredtoby'thesame reference characters- However,"in Fig. ,31 a

ksource of direct current is indicated at "connected lin series with` the windings 35 of the `multipole rotating armature member 34.

The armature member inay beso posie 4tioned that the ends Vof its poles will succesji ice' sively assume positions approximating :thel Y positions 'of th'eends of the' poles of'electromagnet 26. YAccordingly'` Whe-n the arma-Y ture 34; isenergiZedby the direct current 33V and rotated'at a suitablespeed, either'lajpul-k1 'sating' or, 'an alternating eld caribe set up (fdependinguponthe direction of ivindingoi y the 'coils 35), suchy field corresponding iny Y unctionto' the field established byl the elec-fV i Y tromagnetQG above described. Armature: Y vmay* of course be rotated;eitherfrom the source of power `of f themoving vehicle. orV

`from the c arfafrdes',v or iothervvisefV The 'are ran ementinFig. 3.1nay be particularly desira le forvehicles'uponkk Whiclia dependable.

VVhiletheinvention has been'described in e V source of `direct'currentris already* available. r anydesired control currents, but yet the elec- ,troiiagntson the'moving vehicle. maybelQ-4 detail With respectgto particular preferred n examples thereot1 Which give satisfactory reits suits, itvvillbe understood by thoseskilled in-the art after understanding the invention that'va-rious changes and modifications vmay 'securedibyj-Letters 4Patent of the United, '.'State'sfisz fj Y f 4 control circuit comprising a railroad track control block, electrical'connections'ezc.

tending from the l"rails at one end ofsaid blockto a point along the track reached by the moving vehicle previouswto said block,

ymeans at saidv pointior cooperatingvvith 4 means carried by the moving vehicle to estab? '7 lish a vcurrent.V in the circuitlof 'said conk nections and said rails, electrical connections extendinggfromthe rails at the other end of said block to'said point, and additional means controlled by said circuit" and through said last named ,connections and cooperating with v-additi'onal Vmeans carried bythe movingl ve- 4 Fhicle tol operate la control circuit on the ve` f hicle, f* 1 L 2.1 Afcontrol'circuit comprising a railroad`V I track jcontrol block, lelectrical connections ex- .trending fromthe rails at 'one end of saidy 30 themoving vehicle previous to said block,

blockto a point alongthetrack reachedby means at saidpoint for coop eratin g With means Wcarr'ied the moving vehicle to induce a current in the circuit of said connections and 'said rails at the momentv when ythe vehicle ypassessaid point, electrical connections exi tending from 'the' rails vat the otherfend of said blockto said point, and additional means controlled by saidy circuitandV throughsaid lastnamed yconnections and cooperating With additional means carried by the moving vehicle' to operate a controlcircuit on the vehicle.

v3. control circuit comprising a railroad trackcontrol block, electrical connections eX-l ',tending from the rails at one end of said block to af-*point along the ltrackjreached by the l 7 moving vehicle previous to said block, means at said point for cooperating With means carmeans controlled by said undulatory current and cooperating Withl additional means carried by the moving vehicle to operate a control circuiton the vehicle-` ,l

" 4f. f A train control system comprising means carried by the moving vehicle for establishing a varying magnetic'iield, a stationaryelectrovehicle. s

through the rails of said block, control means on the moving vehicle, and means energized' Y n .byv said current and positioned adjacent said `be vmade Without departingk from the spirit andscope of the'inventionlandlit is intended e, 4thereforein the appended claimsto cover all :such-'changes and modifications. s y -Whatis claimed asneW .and desired to be pointfor operating said control means when thefcircuit through therails is continuous and notshort circuited;

5., The method of establishingrailroad vehicle control circuitsin a system comprising af'plurality of control blocks, which comprises inducing, from a source of Vpovver carried by the vehicle While on one control block, amolmentary undulatory currentfpassing through the rails of another control block ahead ofy the 'vehicle when said llastvnamed control block is clear, and utilizing said current to inductively operate a control circuit on the 6. The method yof blocks, f which comprises inducing, from a source of povver carried the vehicle While on one control block, a plurality of current railroad vehicle Vcontrol i in a system comprisinga'plurality of control` impulses passing through therails of another v control block ahead of the vehicle when said last namedcontrol blocky is clear vand utilizing said impulsesto operate a Zrun-down lControl device on the vehicle.

7. 'A control circuit comprising a railroad track control block, electrical conductors connected',.respectively, to the rails at or adjacent one'end 'of said block, saidconductors includblock, said last vnamed conductors including an elect-roemagnetic device, said electro-magnetic devices being positioned beside a control block adjacent said'first named control block.

8. vA control circuit comprising a railroad track control block, electrical conductors connected, respectively, to the rails at or adjacent one end of said block, said conductors including an electro-magnetic device, and electrifing an electro-magnetic device, and electrical conductors connected, respectively, to the krails at or vadjacent the other end of said cal conductors connected,` respectively, to they rails at or adjacent they other end of said block, said last` named conductors including l an electro-magnetic device, the current for energizing one of said devices passing length Wise irst through one rail of said control block and then lengthwise through theothcr rail of said control block, one of said devices inductively operating a `control circuit on a i y vehicle.k l In testimony Nwhereof I have signedmy v nameto this specification.

HARRY B. RUDD.

magneticmeans positioned at the railroad i track at a point'ahead of a control block toy be 

